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CONSOLIDATED BALANCE SHEETS (Parenthetical)
Dec. 31, 2012
USD ($)
Dec. 31, 2012
CNY
Dec. 31, 2011
USD ($)
Dec. 31, 2011
CNY
Allowance for doubtful accounts (in dollars) $ 865,769 5,394,874 $ 859,509 5,419,725
Common stock, par value (in dollars per share) $ 0.002731   $ 0.002731  
Common stock, shares authorized 18,307,038 18,307,038 18,307,038 18,307,038
Common stock, shares issued 4,620,000 4,620,000 4,560,000 4,560,000
Common stock, shares outstanding 4,620,000 4,620,000 4,560,000 4,560,000